Sash-balance



(No Model.)

J. MOARTHUR.

SASH BALANCE.

No. 354,162. v Patented Dec. 14, 1886.

NirE STATES JAMES MCAR'IHUR, OF ROCHESTER, NEW YORK.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 354,162, dated December14, 1886.

Application filed October 1886.

T aZZ whom, it may concern:

' Be it known that I, J AMES MoAn'rnUn, of Rochester, in the county ofMonroe and State ofNew York, have invented a new and useful Improvementin a Device for Snspending Sash, which improvement is fully set forth inthe following specification and shown in the accompanying drawings.

The object of my invention is to produce a compact device for holding orsuspending a window-sash to take the place of the weights and cordscommonly used for the purpose, said device being fully describedhereinbelow, and

' more particularly pointed out in the claims.

Referring to the drawings, Figure 1 is a side sectional elevation of thedevice, showing the parts in place, the frame of the window, a part ofthe frame of the sash-suspender, and the springdrum being verticallysectioned, as on the dotted line 00 in Fig. 2, and viewed as indicatedby the arrow pointed thereon a portion of the sash being similarlysectioned as on the dotted line y to show the staple embedded therein;Fig. 2, an elevation of the device viewed as seen by arrow 2 in Fig. 1;Fig. 3, a view of the same in the opposite direction Fig. 4, a view ofthe device indicated by arrow as in Fig. 1, the minor springs beingomitted; Fig. 5, drawn to a much smaller scale, an ele vation of aportion of a window with its casing, sash, &c., the frame beingvertically sectioned to show the suspending devices for the sash ateither side thereof, the figure being drawn to show the relativeposition of the parts; and Fig. 6, a View of the shaft of. thespring-drum seen in the direction in which Fig. 3 is seen.

Referring to the parts, A is the frame of the window of any suitablestyle or kind; B, the sash thereof, and O the plate of glass in thesash.

D is the frame of the device for suspending the sash, consisting of aplate, a, and side pieces, b.

c is a cylinder or drum inclosing a flat coiled spring, (1, the actionof which, with its mate at the opposite side of the window, suspends thesash.

e is a bar or shaft passing through the drum,

corresponding to the axis thereof, having its projecting ends maderectangular, and resting rigidly in corresponding notches, f, formed inthe side pieces of theframe, by means of which Serial No. 215,395. (Nomodel.)

it is prevented from turning, while the drum may turn freely thereon.

g is a band or suspender for the sash, having one end secured to theconvex edge of the drum and wound therearound, passing thence through anopening. k, in the plate a, and secured at its other end to a staple orholder,

'71, inserted in the sash, as shown.

2' is a friction-strap, constituting a brake or detent for the sash,acting upon the Suspender, being substantially semicircular in form andheld in position to bear upon the outer coil of said suspender as itlies upon the drum. The strap or brake i is held at one end by atransverse pin, Z, rigid with the frame, and at the other end is bentoutward and pierced to receive a stud, a, secured to the plate a in aposition at right angles therewith. At its free end the stud is threadedand provided with a screw-nut, 0, between which and the brake i isplaced a spiral spring, 1), which latter tends to hold the brake downupon the Suspender 9.

Between the brake and the head of the stud or frameaweak spiral spring,7, is placed upon the stud, which tends to hold said brake at all timesagainst the spring These two oppositely-acting springs serve to hold thebrake steady and prevent it vibrating or clattering when the suspenderrubs against it as the drum is turned. By turning the screw-nut 0 towardor from the spring 1) the brake will be caused to bear heavier orlighterupon thesuspcnderg.

The spring (I is coiled in the drum in such a manner that it tends toturn the latter in the direction indicated by the arrow t-that is tosay, in a direction to pull upward upon the sash. The holder h ispreferably inclined upward in the sash, as shown, to better hold itselfin place therein and prevent being pulled out by the suspender.

Regarding the upper sash, it will be seen that when it'is well down andthe suspender nearly unwound from the drum there is little or no contactbetween said suspender and the brake; but when the sash is raised andapproaches its normal place the Suspender thickens upon the drum fromthe added coils under the brake, which causes the latter to bear morefirmly thereagainst, and to so offer increased resistance to theupward-moving sash, thus tending to prevent the latter being broughtviolently against the frame at the top. On account of the spring p andthe elasticity of the brake itself the latter always bears upon thesuspender to control the movement of the sash with a yielding pressure,adding to the smoothness of the working of the device.

The suspending devices are let into openings E, formed in the opposingsides of the window-frame, so that the outer surfaces of the plates ashall be even with the adjacent surfaces of the frame in the placesusually occupied by the cord-pulleys where counterweights are used, thedevices being held in place by common screws, at s, in theusual manner.

The coiled spring d is secured at one end to the shaft e and at theother to the concave surface of the drum, so that when the sash ispulled down the springis wound up or strained.

' Springs, heavy or light, are to be used ac cording to the weight ofthe sash to be suspended in each given case.

What I claim as my invention is 1. In a sash-suspending device, a frame,a rotating spring-drum with contained spring held by said frame, andsuspending-band for the sash, secured to the latter and to said drum, incombination with a semicircular tensionband secured to said framesubstantially concentric with said drum, bearing upon saidsuspending-band to act as a tension therefor,

said tension-band acting upon said suspending-band only when theconnected sash is approaching its uppermost position or increasing itsaction on said suspending'band as said sash rises, substantially asdescribed.

2. In a sash-suspending device, a frame, a rotating spring-drum withcontained spring held by said frame, and suspending-band for the sashsecured to the latter and to said drum, in combination with asemicircular tensionband secured to said frame substantially concentricwith said drum, bearing upon said suspending-band to act as a tensiontherefor, said tension-band being held against said sus-v pending-bandby a spring, 10, acting upon its free end to press said suspending-bandmore firmly as said sash moves upward, substantially as described.

3. In a device for suspending a window-sash, a frame, a rotating springdrum or holder with contained spring, and band or Suspender for thesash, secured to the latter and to said drum, a brake or retarder forsaid sash, in combination with springs 19 and r for said retarder, andthreaded stud and screw-nut, substantially as and for the purposespecified.

JAMES MCARTHUR.

